688zz

Product Overview

The 688ZZ bearing is a metric-size miniature deep groove ball bearing with double metal shields (ZZ) for dust protection and reduced maintenance. Engineered for applications where compact design, high precision, and reliable performance are essential, the 688ZZ is widely used across industrial, medical, and instrumentation fields.

• Bore Diameter (d): 8 mm

• Outer Diameter (D): 16 mm

• Width (B): 5 mm

• Construction: Deep Groove Ball Bearing

• Shields: Double Shielded (ZZ) – non-contact metal shields on both sides

• Ball & Race Material: Chrome Steel (AISI 52100, GCr15)

• Cage: Steel / optional nylon (varies by manufacturer)

• Precision Rating: Typically ABEC-1 / ISO P0 (higher grades available on request)

This bearing provides low friction, quiet operation, and high-speed capability, making it an excellent choice for environments requiring long service life in limited-space installations.

Key Features of 688ZZ Bearing

• Compact Design: Fits into tight spaces without compromising load capacity.

• Durability: Made from high-quality chrome steel for strength and wear resistance.

• High-Speed Operation: Capable of supporting high RPM with reduced vibration.

• Low Maintenance: Metal shields protect against dust and contaminants.

• Versatility: Suitable for both radial and limited axial loads.

Applications of 688ZZ Bearing

The 688ZZ miniature ball bearing is used in a variety of precision-driven industries:

• Medical Devices: Cryogenic coolers, pulmonary assist devices, dental tools

• Instrumentation: Clocks, gyros, analytical equipment, optical devices

• Aerospace & Defense: Fuel controls, surveillance systems

• Consumer Electronics: Computer cooling fans, small motors, robotics

• Industrial Machinery: Automation equipment, 3D printers, and precision drives

Its small size, high accuracy, and quiet performance make it a preferred solution wherever space-saving and reliability are critical.

Maintenance & Troubleshooting Tips

Proper handling and maintenance extend the life of 688ZZ bearings:

1. Inspection: Regularly check for signs of contamination, wear, or abnormal noise.

2. Cleaning: If needed, clean using a non-corrosive solvent, dry thoroughly, and re-lubricate.

3. Lubrication: Use appropriate grease or oil depending on application speed and environment.

4. Replacement: Replace the bearing immediately if excessive wear, pitting, or damage is observed.

5. Correct Use: Ensure load and speed conditions are within the manufacturer’s specifications to prevent premature failure.

Why Choose 688ZZ Bearings?

• Meets ISO & ABEC industry standards for precision

• Widely available, cost-effective, and interchangeable with leading brands

• Reliable in high-speed, small-space, and precision-demanding applications